After the end of the world, the earth is barren,
Everything is devoured by the greed of the Demon King City.

In order to rescue the summer solstice who was taken captive to the Demon King City,
In order to break the fate of the desert,
The spirits and their companions went deep into the city,
only to find that the truth is not the same as imagined.

In the Demon King City, the Demon King is revered as a god,
The truth of the desert is gradually revealed in front of us,
The spirits are about to face their final decision...